"I never truly understood how much health care in the U.S. costs until I got appendicitis in October," he wrote on the social media site. "I'm a 20-year-old guy. Thought other people should see this to get a real idea of how much an unpreventable illness costs in the U.S."

The recovery room alone cost $7,501.00, which the man said was surprising because he spent only two hours in there. The surgery cost $16,277.

"I think you can see how outrageous some of these costs are," he wrote.

But the bill was not so unusual, given recent studies that showed how the cost of medical procedures could vary from hospital to hospital, said Timothy McBride, a professor and health policy analyst at Washington University in St. Louis.

In April, University of California San Francisco researchers set out to find out how much an appendectomy cost among 19,000 patients in California. An appendectomy varied in price from $1,529 to $182,955, the researchers wrote in the study published in the journal Archives of Internal Medicine.

"For some reasons that are probably quite legitimate, they pad these prices to cover what economists might call fixed costs," McBride said. These include such items as uncompensated care and staff costs, he said. Hospital prices can therefore vary depending on whether the hospital is a teaching hospital, sees more patients with chronic disease or offers only basic care.

As a result, patients shouldn't be afraid to ask questions, and -- if necessary -- ask for a price reduction, McBride said.

"It's kind of like an opening bid if you went into an auto store," McBride said of hospital billing. "Very few people now pay the sticker price."

Sutter General Hospital spokeswoman Nancy Turner said hospital billing is complicated, and that the hospital has people available to help patients navigate it. She said hospitals often serve many patients who don't pay at all or don't pay the actual cost of treatment because they are on Medicare or Medi-Cal, California's version of Medicaid.

"Sutter Health agrees that an improved billing structure is needed, where published charges are more closely aligned with actual costs," Turner said. "And a more straightforward pricing system is only possible when reimbursement from government-sponsored patients covers actual costs."